| 新疆北部地区上古生界火山岩分布及其构造环境 |
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| 引用本文： | 李建忠,吴晓智,齐雪峰,郑曼,张庆春.新疆北部地区上古生界火山岩分布及其构造环境[J].岩石学报,2010,26(1):195-206. |
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| 作者姓名： | 李建忠 吴晓智 齐雪峰 郑曼 张庆春 |
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| 作者单位： | 1. 中国石油勘探开发科学研究院,北京,100083
2. 中国石油新疆油田分公司,克拉玛依,834000 |
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| 基金项目： | 国家重点基础研究发展计划“973”项目(2009CB219306)资助 |
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| 摘 要： | 新疆北部地区石炭系火山岩主要发育于石炭纪-早二叠世由洋盆向陆内盆地转换阶段,发育碰撞与碰撞后伸展期两类构造环境火山岩; 围绕造山带构成西准噶尔、东准噶尔、准南三大岩区; 石炭系主要发育玄武岩-安山岩-英安岩-流纹岩组合,二叠系主要发育玄武岩-安山岩-流纹岩组合。下石炭统多表现为碰撞期活动陆缘构造环境海相中基性火山岩,上石炭统表现为被动陆缘海陆过渡相钙碱性系列中酸性火山岩; 下二叠统表现为陆相偏碱性中基性、中酸性火山岩。西准噶尔石炭系火山岩为一套海陆交互相中基性火山岩组合,具汇聚岛弧过渡壳特点。东准噶尔石炭系火山岩为一套基性、中酸性岩石组合,具早期岛弧挤压、晚期板内伸展环境特征; 准南博格达山前表现为典型裂谷环境火山岩。二叠系火山岩均为碰撞期后板内伸展构造环境,主要分布于西准噶尔岩区; 表现为东准卡拉麦里残留洋最先闭合隆升,西准达尔布特残留洋随后闭合,最后是北天山洋关闭构造演化次序。新疆北部地区上古生界石炭系-下二叠统火山岩油气成藏多遵循“源控论”,主要围绕石炭系与下二叠统烃源岩发育区、有效生烃中心于构造高部位成藏,晚石炭世伸展裂陷应为有利勘探领域。
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| 关 键 词： | 火山岩分布 岩石学特征 地球化学特征 构造环境 上古生界 新疆北疆 |
| 收稿时间： | 5/1/2009 12:00:00 AM |
| 修稿时间： | 2009/12/1 0:00:00 |
Distribution and tectonic setting of Upper Paleozoic volcanic rock in northern Xinjiang |
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| Li JZ,Wu XZ,Qi XF,Zheng M and Zhang QC.Distribution and tectonic setting of Upper Paleozoic volcanic rock in northern Xinjiang[J].Acta Petrologica Sinica,2010,26(1):195-206. |
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| Authors: | Li JZ Wu XZ Qi XF Zheng M and Zhang QC |
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| Institution: | PetroChina Institute of Petroleum Exploration and Development, Beijing 100083, China;PetroChina Institute of Petroleum Exploration and Development, Beijing 100083, China;Xinjiang Oil Field Subdivision of PetroChina, Karamay 834000, China;PetroChina Institute of Petroleum Exploration and Development, Beijing 100083, China;PetroChina Institute of Petroleum Exploration and Development, Beijing 100083, China |
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| Abstract: | Carboniferous volcanic rock developed in the translating period from ocean basin to continental basin in Carboniferous-Early Permian. There are two types of tectonic setting volcanic rock: Collision and post-collision extending stage volcanic rock, and they are distributed in western Junggar, eastern Junggar and southern Junggar around the orogenic belt. Lower Carboniferous volcanic rock was oceanic basaltic, representing continental margin tectonic setting in collision stage. Upper Carboniferous was marine-continental transitional facies intermediate-acid volcanic rock, representing passive continental margin tectonic setting. Lower Permian was continental basaltic and intermediate-acid volcanic rock. Carboniferous volcanic rock in western Junggar was composited by basaltic and intermediate-acid volcanic rock, showing the character of convergence island arc transitional crust. Carboniferous volcanic rock in eastern Junggar was an assemblage of basic and intermediate-acid, representing early island arc extrusion stage and late intraplate extension stage. Carboniferous volcanic rock in southern Junggar in the front of the Bogda Mountain displays a typical rift environment. The Permian volcanic rock mainly distributed in western Junggar, having the characteristics of post-collision stage intraplate extension tectonic setting. It showed the tectonic evolution sequence was: Kelameili remnant ocean basin closed and uplifted in the first in eastern Junggar, Daerbute remnant ocean basin in the next western Junggar, northern Tianshan Ocean closed lastly. The reservoir formation of Carboniferous and Permian volcanic rock was mainly controlled by Carboniferous hydrocarbon source rock. Favorable pool-forming area was surrounded effective source rock. Late Carboniferous extension rift was a potential of hydrocarbon accumulation. |
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| Keywords: | Volcanic rock distribution Petrological characteristics Geochemical characteristics Tectonic setting Upper Paleozoic Northern Xinjiang |
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